CN114396146A - Composite board with color register effect and preparation method thereof - Google Patents
Composite board with color register effect and preparation method thereof Download PDFInfo
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- CN114396146A CN114396146A CN202210021662.1A CN202210021662A CN114396146A CN 114396146 A CN114396146 A CN 114396146A CN 202210021662 A CN202210021662 A CN 202210021662A CN 114396146 A CN114396146 A CN 114396146A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/181—Insulating layers integrally formed with the flooring or the flooring elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
- E04F2290/04—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a composite board with color register effect and a preparation method thereof, wherein the board comprises a ground color base material, a non-continuously distributed coloring body layer and a surface protective layer, wherein the decorative surface of the base color base material is provided with a pattern pressing path; the base color substrate comprises a hot-melt first resin, a filler macroscopically uniformly dispersed in the first resin, and a first colorant; the color body layer contains a second resin as a carrier and a second coloring material macroscopically uniformly dispersed in the second resin; the second resin has a lower Tg than the first resin. The composite board provided by the invention has the advantages that the surface can form a clear color register effect, the phenomenon that a plurality of pigments are mixed with each other is avoided, the composite board has a 3D visual sense, in addition, the color register effect on the surface is not easy to disappear due to abrasion, and the color register effect is long in retention time.
Description
Technical Field
The invention relates to the technical field of composite boards, in particular to a composite board with a color register effect.
Background
The floor is often used in the floor decoration process of a building, however, on one hand, the price of the solid wood floor is increased along with the increasing shortage of original forest resources and the increasing of environmental protection, and on the other hand, the solid wood floor is high in maintenance cost and easy to damage, so that the solid wood floor can be laid to cause large economic expenditure.
In order to solve the problems of the solid wood floor, composite materials such as wood plastic, stone plastic and the like are developed to produce the floor. The main body of the floor is composed of thermoplastic resin and wood powder or stone powder, and compared with solid wood, the floor has the advantages of moisture resistance, insect prevention, corrosion resistance and the like, and the maintenance cost is lower. In the production and processing processes of wood-plastic and stone-plastic products, pigments are usually added into the raw materials, so that the prepared products have more natural texture. When the pigment is added, if only one pigment is added, the obtained product has single color and cannot meet the visual requirement required by decoration, and when a plurality of pigments are added, the color mixing effect is unstable, the surface color is uneven, the formed color grains can hardly reach the grain effect of solid wood, and even some products lose the color mixing effect due to mixing of the pigments after being extruded.
The patent document with the patent application number of CN201010241212.0 provides a production method of a high-simulation 3D solid wood floor and a product thereof, and the production flow of the floor is as follows: carrying out concave-convex three-dimensional surface treatment on the surface of the base material; transferring wood grains to the rubber roller through a steel roller with wood grains, printing the wood grains on the substrate for 2-3 times through the rubber roller, and coating 1-2 times of finish on the surface of the substrate; and printing wood grains on the substrate for 2-3 times, and finally coating 2-5 coats of finish on the surface of the substrate. The scheme is that firstly, a base plate is coated with colored primer to form a bottom layer color, and then wood grains are printed for multiple times on the basis of the primer, so that a color register effect is formed between the primer and various wood grains. According to the scheme, on one hand, the operation is complex, wood grains are required to be printed and coated with finish paint for multiple times, the production flow is long, on the other hand, the color register effect is formed mainly by the wood grain pigment printed on the surface of the substrate, and the printed wood grains disappear when the surface of the substrate is worn.
Disclosure of Invention
In order to solve the problems, the invention provides a composite board with a color register effect, the decorative surface of the composite board can form the color register effect with clear lines, and the lines and the color of the floor surface can be maintained after the floor surface is worn.
In order to achieve the purpose, the invention adopts the following technical scheme:
a composite board with color register effect comprises a ground color substrate with a decorative surface provided with pattern pressing paths, discontinuously distributed coloring body layers arranged in gullies of the pattern pressing paths and a surface protection layer covering the decorative surface of the ground color substrate; the base color substrate comprises a hot-melt first resin, a filler macroscopically uniformly dispersed in the first resin, and a first colorant; the color body layer contains a second resin as a carrier and a second coloring material macroscopically uniformly dispersed in the second resin; the second resin has a lower Tg than the first resin.
When multiple pigments are directly added into a base material in the prior art, the problems of unstable color mixing effect and uneven surface color can occur, the formed color grains can hardly achieve the grain effect of solid wood, and even some products lose the color mixing effect after being extruded because of mixing among the pigments. According to the invention, only the first pigment is added into the ground color substrate, so that the problems can not be caused, the prepared ground color substrate has uniform color, and the surface of the substrate forms a natural background color effect. The decorative surface of the bottom layer prefabricated body is provided with embossed patterns, colored bodies are formed in the embossed patterns, the colored bodies contain second coloring materials, and the base color base materials and the colored bodies form different color areas, so that the color register effect can be obtained. The surface protective layer at the outermost layer is made of hard wear-resistant materials and plays a role in protecting and enhancing the surface of the floor.
The present invention is distinguished from the prior art in that a color body layer containing a second coloring material is present in the embossed pattern. The knurling way can form three-dimensional 3D structure on the surface of ground colour substrate, realize the imitative wood grain effect, the decorative cover of ground colour substrate has formed the depressed area that has the knurling way and has not had the plane district of knurling way this moment, the colouring body forms back among the knurling way, the decorative cover on floor has two kinds of colours that are appeared by first colouring material and second colouring material, the colour of first colouring material presents through the plane district of decorative cover, and the colour of second colouring material presents through the depressed area of decorative cover, because there is difference in height in plane district and depressed area, consequently can form the dark and light effect in the vision, press close to the feel of true wood grain more. The embossing path is composed of a plurality of embossing units, each embossing unit forms a gully structure, the embossing units are arranged independently, all the embossing units form an embossing layer structure together in space, coloring bodies containing the second coloring material are arranged in the gullies of each embossing unit, the plurality of coloring bodies form a coloring body layer together, and the embossing units are independent and discontinuous, so that the coloring bodies arranged in the gullies of different embossing units are also discontinuous, namely the discontinuous distribution.
On the other hand, since the colored body with the second colorant is formed in the depressed embossed road, when the floor panel is worn, the portion where wear is first generated is a flat area of the decorative surface, since the flat area is composed of a base color base material of a single color, the base color base material is uniform in color as a whole, and even if the color is not changed by wear, the colored body is protected in the embossed road, and the floor panel does not lose the color area represented by the second colorant due to wear. In the prior art, a plurality of pigments are stacked layer by layer in a printing mode, when a certain layer is worn, the pigment on the layer can be ground off to cause the damage of the color register effect, and the floor in the invention can not change the grain and the color distribution of the decorative surface when being worn, thereby having the advantage in the occasions with high wear rate.
Further, the filler is selected from one or more of inorganic mineral powder and wood fiber powder. The mixed filler is usually a powdery material which is cheaper than the first resin, and the base color base material formed of the first resin needs to constitute the main structure of the floor board, so that the thickness is large, and the amount of raw materials used is largeIf the floor is completely formed by the first resin, the cost is greatly improved, the market competitiveness is reduced, on the other hand, the floor completely made of the first resin has certain defects in physical strength, and the filler can play a role in reinforcing the physical strength. Generally speaking, there are two types of materials which are common in the art and are relatively inexpensive, the first type is represented by mineral powder such as heavy calcium carbonate, wollastonite, etc., and these mineral powder usually have relatively high density (density of 2.4-3 g/m)3) After being mixed and molded with the first resin, a high-density product is obtained, and the product is generally called as 'stone plastic'; the second category is represented by wood fiber powder such as bamboo powder and wood powder, which can be mixed with the first resin to form a product with relatively similar texture and color to wood and generally lighter self weight, and such a product is generally called "wood plastic". The stone-plastic product can contain one or more mineral powder, and the wood-plastic product can also be added with one or more wood fiber powder from one or more sources. Obviously, in the process of producing the stone plastic or wood plastic, in addition to the first resin, the first colorant and the mineral powder or the wood fiber powder, some additives, such as an antioxidant, a coupling agent, a lubricant, etc., are required to be added, and the use of such additives is a common means in the art, so the description of the present invention is omitted.
The first resin is a resin which can be converted from a solid state to a viscous state by raising the temperature and can be recovered to the solid state after lowering the temperature, and most commonly is a polyvinyl chloride resin, a polyolefin resin and the like.
Further, the surface protection layer comprises a base coat layer arranged on the decorative surface of the base color substrate, a thermal insulation coating layer arranged on the base coat layer and an abrasion-resistant coating layer.
Another object of the present invention is to provide a method for preparing the composite board with color register effect, comprising the following steps:
s1, providing a base color substrate made of thermoplastic first resin, filler, first color material and other additives;
s2, forming embossed patterns on the decorative surface of the ground color substrate by using embossing equipment to obtain an embossed substrate;
s3, coating a coating liquid containing a second coloring material and a second resin on the decorative surface of the embossed base material;
s4, solidifying the coating liquid to form a continuous layered coloring body attached to the decorative surface of the embossed substrate to obtain a coated substrate;
s5, grinding the continuous layer-shaped coloring body on the decorative surface of the coating substrate by a grinding element, removing the coloring body part which is filled outside the grooves of the embossed pattern path and has enough contact force with the grinding element and the groove opening part of the grooves of the embossed pattern path, reserving the coloring body part which is filled in the grooves of the embossed pattern path and cannot be contacted with the grinding element or is not contacted with the grinding element, and converting the continuous layer-shaped coloring body into a non-continuously distributed coloring body layer (2) to obtain the grinding substrate;
and S6, coating the decorative surface of the polished base material to form a coating layer, and curing the coating layer to form a surface protection layer, thereby obtaining the composite board with the color register effect.
In order to realize the color register effect, the invention needs to ensure that the coloring body containing the second coloring material exists in the concave area of the decorative surface and does not exist in the plane area of the decorative surface. This purpose can be realized to knurling way position spraying coating liquid through numerical control high accuracy, however this scheme spraying process time is long, and the technological requirement is higher, and changes the knurling way of different shapes at every turn and all need set for different spraying routes, and the operation is comparatively difficult in the actual production. The invention adopts different ideas, namely, coating liquid is firstly used for completely covering the decorative surface of the base color substrate, then the decorative surface is polished, as the plane area and the area higher than the depressed area of the decorative surface, the second pigment on the plane area can be removed in the polishing process, the second pigment on the depressed area can be reserved, and the color of the first pigment carried by the base color substrate is exposed after the color body on the plane area is removed, thereby forming the color register effect. In order to facilitate removal of the second coloring material, the coating liquid should be more easily removed from the base material after curing to form a layered colored body, and if the hardness and abrasion resistance of the layered colored body are stronger than those of the base material, there are difficulties in selecting a polishing material and in actual processing. Therefore, in the present invention, it is preferable that the Tg value of the second resin in the coating liquid is lower than that of the first resin, so that the second resin has lower hardness and is easier to abrade, and excessive abrasion of the base color substrate during abrasion is avoided. In actual production, when the decoration surface is polished, because the color body has low wear resistance and hardness, the polishing material will partially take away the color body in the embossing gully region, and the color body can form a 3D visual effect after being partially polished. If the solidified coloring body in the concave area is not ground, the coloring body can completely fill the concave area, and finally the surface of the plate still forms a 2D plane without generating a 3D visual effect, and after the coloring body in the concave area is partially ground, the concave area can form an uneven structure, and finally the 3D visual effect is formed.
Further, step S2 includes the following operations: the decorative surface of the embossed base material is firstly polished and then subjected to corona treatment, and the adhesion of the coating liquid on the surface of the base color base material can be improved.
Further, the additive in step S1 is selected from one or more of an antioxidant, a lubricant, a coupling agent, and a stabilizer.
Further, step S5 includes the following operations: and cleaning the polished substrate by adopting a mechanical sweeping, wind blowing or fluid flushing mode.
The coating process described in step S6 includes: and coating a bottom coating on the polished substrate, coating a heat insulation coating after the bottom coating is cured, and coating a wear-resistant paint layer after the heat insulation coating is cured.
The base coat is formed by paint with good wettability among base materials of the base color, and the base coat can enhance the adhesion of other paint layers on the surface of the plate; the heat insulation coating is formed by paint with lower heat conductivity after being cured, such as composite silicate heat insulation coating, ceramic heat insulation coating, hollow glass bead heat insulation coating, metal type bauxite heat insulation coating and the like; the wear-resistant coating is formed by paint with higher hardness and better wear resistance after being cured.
Further, the base coat is a transparent UV light-cured coating.
Further, the second resin in step S3 is a water-soluble resin, and the coating liquid is an aqueous color paste containing the second resin. The aqueous color paste herein refers to a mixed system of a second colorant dissolved in water as a solvent and a matrix carrier, which is usually an aqueous resin.
In summary, the following beneficial effects can be achieved by applying the technical scheme of the invention:
1. the surface of the composite board provided by the invention can form a clear color register effect, the pattern shape of the color register effect is easy to control, the phenomenon that a plurality of pigments are mixed with each other is avoided, and the visual effect is better.
2. The color register effect formed on the surface of the plate provided by the invention has 3D visual sense, the first pigment is presented by the plane area of the decorative surface, the second pigment is presented by the gully part of the embossed pattern of the decorative surface, and the height difference exists between the plane area and the depressed area, so that the first pigment and the second pigment present different levels of color effects, and the visual sense is enhanced.
3. The preparation method of the board provided by the invention is simple to operate, has lower process requirements, does not need to coat multiple layers of pigments on the surface of the floor, does not need fine processing operations such as fixed-point spraying and the like, and has high production efficiency and lower production cost.
4. The color register effect on the surface of the plate provided by the invention is not easy to disappear due to abrasion, the retention time of the color register effect is long, and especially, the color register pattern can have longer service life under the environmental condition of higher abrasion rate of the floor.
5. The heat insulation layer coated on the surface of the plate provided by the invention has the functions of reflection and heat insulation and has the effect of surface cooling.
Drawings
FIG. 1 is a schematic view and a partially enlarged view of the structure of a composite board in example 1;
in the figure, 1-base substrate, 2-colouring body, 3-protective surface layer, 31-base coat, 32-thermal barrier coat, 33-wear coat.
Detailed Description
Preferred embodiments of the present invention are further illustrated by the following examples.
Example 1
A preparation method of a composite board with a color register effect comprises the following steps:
s1, adding the first color material into the PE wood-plastic mixture, melting and extruding the mixture into a mold through an extruder, and shaping to obtain a base color substrate;
s2, forming a pattern embossing path with the depth of 0.8-1.0 mm on the decorative surface of the base color substrate by utilizing an embossing roller in a hot pressing mode to obtain an embossed substrate;
s3, polishing the decorative surface of the embossing base material by using a 240-mesh abrasive belt to form a rough structure on the decorative surface;
s4, performing corona treatment on the decorative surface of the embossed base material by using a corona machine to form an activated surface;
s5, coating the decorative surface of the embossed substrate with the water-based coloring agent, wherein the coating weight is 30g/m2Aqueous colorant was allowed to cover the decorative surface and fill the embossed pattern, followed by 395nm, 8W/cm2Ultraviolet curing treatment and drying to form a layered coloring body and prepare a coating base material; the water-based colorant is composed of 15 parts of acrylic acid hydrosol, 60 parts of water, 3 parts of water-based second pigment, 2 parts of thickening agent and 8 parts of ethanol;
s6, sequentially polishing the decorative surface of the coating base material by using abrasive belts of 180 meshes and 320 meshes again, polishing continuous layered coloring bodies on the decorative surface of the coating base material by using a polishing element, removing coloring body parts which are filled in groove openings of grooves of embossed patterns and grooves of the embossed patterns and have enough contact force with the polishing element, keeping the coloring body parts which are filled in the grooves of the embossed patterns and cannot be contacted with the polishing element or are not contacted with the polishing element, converting the continuous layered coloring bodies into discontinuously distributed coloring body layers to prepare the polishing base material, and brushing residues on the surface of the polishing base material;
s7, coating primer on the decorative surface of the polished substrate by using a roller coater, wherein the coating weight is 15g/m2And passes through 395nm, 8W/cm2The ultraviolet lamp is used for irradiating and curing to form a base coating so as to promote other paint layers to be better attached to the base material and prevent the paint layers from falling off and delaminating;
s8, coating the surface of the bottom coating with heat insulation paint by using a roller coater, wherein the coating weight is 40g/m2Drying and curing the mixture by a 60 ℃ oven to form a heat insulation coating;
s9, coating wear-resistant paint on the surface of the thermal insulation coating by using a roller coater, wherein the coating weight is 50g/m2And passes through 395nm, 8W/cm2The ultraviolet lamp irradiates and cures to form the wear-resistant coating, and the composite board with the color register effect is obtained.
The composite board structure prepared by the method is shown in figure 1, the composite board comprises a base color substrate 1 forming a board main body structure, a plurality of embossed patterns are formed on the decorative surface of the base color substrate 1 through an embossing process, the decorative surface comprises a concave area with the embossed patterns and a plane area without the embossed patterns, a coloring body 2 is arranged in the concave area, and the plane area, the concave area and the coloring body are all covered by a surface protection layer 3; the surface protection layer comprises a bottom coating 31, a thermal barrier coating 32 and an abrasion resistant coating 33 from inside to outside. More specifically, the coloring body does not completely fill the recessed regions formed by the embossed pattern, but leaves a certain vacant region near the openings of the recessed regions, the vacant region being filled with the paint layer above. The empty areas are formed in step S6, and when the coloring layer is polished, the colorant in the planar area is substantially removed, and the colorant in the recessed area is partially removed along the stripe, so that the colorant in the recessed area cannot be completely filled, and two color areas with different colors and different heights are formed on the decorative surface, thereby realizing the 3D visual effect.
Example 2
A preparation method of a composite board with a color register effect comprises the following steps:
s1, adding the first color material into the PVC wood-plastic mixture, melting and extruding the mixture into a mold through an extruder, and shaping to obtain a base color substrate;
s2, forming a pattern embossing path with the depth of 0.8-1.0 mm on the decorative surface of the base color substrate by utilizing an embossing roller in a hot pressing mode to obtain an embossed substrate;
s3, polishing the decorative surface of the embossing base material by using a 240-mesh abrasive belt to form a rough structure on the decorative surface;
s4, performing corona treatment on the decorative surface of the base color substrate by using a corona machine to form an activated surface;
s5, coating 10 g/m on the decorative surface of the embossed substrate2After the polyester primer is dried, the polyester primer is coated with an oily colorant, and the coating weight is 30g/m2Covering the decorative surface with the oil-based coloring agent, filling the pattern pressing path, and then airing the oil-based coloring agent to form a layered coloring body to prepare a coating base material; the oily colorant comprises 25 parts of long-oil alkyd resin, 20 parts of propylene glycol methyl ether acetate, 15 parts of tetramethylbenzene, 6 parts of an oily second coloring material, 0.5 part of a defoaming agent, 0.2 part of a leveling agent and 0.3 part of a wetting dispersant;
s6, sequentially polishing the decorative surface of the colored substrate by using abrasive belts of 180 meshes and 320 meshes again, polishing continuous layered coloring bodies on the decorative surface of the coated substrate by using a polishing element, removing coloring body parts which are filled in groove openings of grooves of embossed patterns and grooves of the embossed patterns and have enough contact force with the polishing element, reserving coloring body parts which are filled in the grooves of the embossed patterns and cannot be contacted with or are not contacted with the polishing element, converting the continuous layered coloring bodies into discontinuously distributed coloring body layers to prepare the polished substrate, and brushing residues on the surface of the polished substrate;
s7, coating primer on the decorative surface of the colored substrate by using a roller coater, wherein the coating weight is 15g/m2And passes through 395nm, 8W/cm2The ultraviolet lamp is used for irradiating and curing to form a base coating so as to promote other paint layers to be better attached to the base material and prevent the paint layers from falling off and delaminating;
s8, coating the thermal insulation paint on the bottom coating by using a roller coater, wherein the coating weight is 40g/m2Drying and curing the mixture by a 60 ℃ oven to form a heat insulation coating;
s9, coating wear-resistant paint on the thermal insulation coating by using a roller coater, wherein the coating weight is 50g/m2And passes through 395nm, 8W/cm2Ultraviolet ray of (2)And (5) irradiating and curing the light to form the wear-resistant coating, thus obtaining the composite board with the color register effect.
Comparative example 1
S1, preparing a PE wood-plastic substrate, and coating 15g/m on the surface of the substrate2The water-based UV primer is subjected to ultraviolet curing and then coated with a layer of 30g/m2The white UV primer is dried by combining infrared rays and ultraviolet rays to form a white background color;
s2, base coloring the base material, namely coating a layer of 30g/m2The common UV coloring primer is dried by ultraviolet rays to form a ground color;
s3, printing a wood grain pattern on the surface of the UV coloring primer through a rubber roller;
s4, coating a layer of 40g/m on the surface of the wood grain pattern2The heat-insulating paint is dried to form a heat-insulating paint layer;
s5, coating a layer of 50g/m on the surface of the heat-insulating paint layer2And (3) curing the wear-resistant paint by ultraviolet light to form a wear-resistant paint layer, thus obtaining the composite board with the color register effect.
And (3) product testing:
the composite boards obtained in examples 1 and 2 and comparative example 1 were fed into an abrasive belt machine, the decorative surface having a color register effect was polished with a 80-mesh coarse abrasive paper, whether the color register effect of the polished surface was complete was observed every 5min, and the results are recorded in table 1.
TABLE 1
| Grinding time/min | Example 1 | Example 2 | Comparative example 1 |
| 5 | Complete (complete) | Complete (complete) | Complete (complete) |
| 10 | Complete (complete) | Complete (complete) | Complete (complete) |
| 15 | Complete (complete) | Complete (complete) | Partial disappearance |
| 20 | Complete (complete) | Complete (complete) | Disappearance (disappearance) |
In examples 1 and 2 and comparative example 1, the materials and thicknesses of the thermal barrier coating and the abrasion resistant coating were the same, and therefore the surface abrasion resistance was theoretically equivalent. The examples are different from the comparative examples in that the decorative surface of the wood-plastic substrate in the comparative example is a plane structure, no embossed pattern is formed, and the wood grain forming the color register effect is directly printed on the plane of the colored primer. As can be seen from Table 1, the color register effect of comparative example 1 is partially disappeared after 15min of polishing, and the color register effect is completely disappeared after further polishing, while the color register effect of examples 1 and 2 is maintained after 20min of polishing. The reason is that in comparative example 1, after the abrasion resistant paint layer and the thermal insulating paint layer were sanded off, the sandpaper directly contacted the wood grain layer, so that the wood grain layer was sanded off, whereas in examples 1 and 2, after the abrasion resistant paint layer and the thermal insulating paint layer were sanded off, the sandpaper contacted the plane region of the decorative surface and was sanded, and did not contact the depressed region where the second coloring material was located, so that the depressed region was always in a sound state until the height difference between the plane region and the depressed region was sanded off. Therefore, under the condition that the surface wear resistance of the plate is equivalent, compared with the prior art, the color register effect has longer service life and is not easy to eliminate due to wear. In addition, compared with the prior art, the process flow is simpler, the first pigment is directly added into the wood-plastic base material, the color of the base material is used as the background color, the process of painting white paint and then painting background paint is omitted, and the production efficiency is higher.
The above detailed description is merely illustrative of the invention and is not to be construed as limiting the invention. Any changes that may be made by one skilled in the art after reading the description of the invention are, within the purview of the claims, protected by the patent laws.
Claims (10)
1. The utility model provides a composite board with chromatography effect which characterized in that: the decorative surface comprises a ground color base material (1) with a decorative surface provided with embossed patterns, a non-continuously distributed coloring body layer (2) arranged in a gully of the embossed patterns, and a surface protective layer (3) covering the decorative surface of the ground color base material; the base color substrate (1) comprises a first hot-melt resin, a filler macroscopically uniformly dispersed in the first resin, and a first coloring material; the color body layer (2) contains a second resin as a carrier and a second coloring material macroscopically uniformly dispersed in the second resin; the second resin has a lower Tg than the first resin.
2. The composite board with color register effect as claimed in claim 1, wherein: the filler is selected from one or more of inorganic mineral powder and wood fiber powder.
3. The composite board with color register effect as claimed in claim 1, wherein: the surface protection layer (3) comprises a bottom coating (31) arranged on the decorative surface of the base color substrate (1), a heat insulation coating (32) arranged on the bottom coating and a wear-resistant coating (33).
4. A method of making the composite panel of claim 1, comprising the steps of:
s1, providing a base color substrate made of thermoplastic first resin, filler, first color material and other additives;
s2, forming embossed patterns on the decorative surface of the ground color substrate by using embossing equipment to obtain an embossed substrate;
s3, coating a coating liquid containing a second coloring material and a second resin on the decorative surface of the embossed base material;
s4, solidifying the coating liquid to form a continuous layered coloring body attached to the decorative surface of the embossed substrate to obtain a coated substrate;
s5, grinding the continuous layer-shaped coloring body on the decorative surface of the coating substrate by a grinding element, removing the coloring body part which is filled outside the grooves of the embossed pattern path and has enough contact force with the grinding element and the groove opening part of the grooves of the embossed pattern path, reserving the coloring body part which is filled in the grooves of the embossed pattern path and cannot be contacted with the grinding element or is not contacted with the grinding element, and converting the continuous layer-shaped coloring body into a non-continuously distributed coloring body layer (2) to obtain the grinding substrate;
and S6, coating the decorative surface of the polished base material to form a coating layer, and curing the coating layer to form a surface protection layer, thereby obtaining the composite board with the color register effect.
5. The method for preparing a composite board according to claim 4, wherein the method comprises the following steps: step S2 further includes the following operations: and polishing the decorative surface of the embossed base material, and then performing corona treatment.
6. The method for preparing a composite board according to claim 4, wherein the method comprises the following steps: the additive in the step S1 is selected from one or more of an antioxidant, a lubricant, a coupling agent and a stabilizer.
7. The method for preparing a composite board according to claim 4, wherein the method comprises the following steps: step S5 further includes the following operations: and cleaning the polished substrate by adopting a mechanical sweeping, wind blowing or fluid flushing mode.
8. The method for preparing a composite board according to claim 4, wherein the method comprises the following steps: the coating process described in step S6 includes: and coating a bottom coating on the polished substrate, coating a heat insulation coating after the bottom coating is cured, and coating a wear-resistant paint layer after the heat insulation coating is cured.
9. The method for preparing a composite board according to claim 8, wherein: the base coat is a transparent UV light-cured coating.
10. The method for preparing a composite board according to claim 8, wherein: the second resin in the step S3 is a water-soluble resin, and the coating liquid is an aqueous color paste containing the second resin.
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| CN202210021662.1A CN114396146B (en) | 2022-01-10 | 2022-01-10 | Composite board with color matching effect and preparation method thereof |
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| CN114396146B (en) | 2023-07-04 |
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